Treatment of cholangiocarcinoma

ABSTRACT

Disclosed herein are methods of treating cholangio carcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more EGER mutants including at least the mutation FGFR3 R397C; or one or more EGER mutants including at least the mutation FGFR3 L608F; or one or more EGER mutants including at least the fusion FGFR2-TACC2; and treating the patient with an EGER inhibitor if one or more EGER mutants including at least the mutation FGFR3 R397C; or one or more EGER mutants including at least the mutation FGFR3 L608F; or one or more EGER mutants including at least the fusion FGFR2-TACC2 are present in the sample.

TECHNICAL FIELD

Provided herein are methods of treating cholangio carcinoma in a patient harboring one or more FGFR mutants with a fibroblast growth factor receptor inhibitor.

BACKGROUND

The identification of genetic abnormalities can be useful in selecting the appropriate therapeutic(s) for cancer patients. This is also useful for cancer patients failing the main therapeutic option (front-line therapy) for that cancer type, particularly if there is no accepted standard of care for second and subsequent-line therapy. Fibroblast growth factor receptors (FGFRs) are a family of receptor tyrosine kinases involved in regulating cell survival, proliferation, migration and differentiation. FGFR alterations including FGFR mutations and FGFR fusions or translocations have been observed in some cancers. To date, there are no approved therapies that are efficacious in patients with FGFR alterations.

SUMMARY

Disclosed herein are methods of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants; and treating the patient with an FGFR inhibitor if one or more FGFR mutants are present in the sample.

Disclosed herein are methods of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least the FGFR2 SNP C383R; or one or more FGFR mutants including at least the fusion FGFR2-BICC1; or one or more FGFR mutants including at least the fusion FGFR2-CCAR1; or one or more FGFR mutants including at least the fusion FGFR2-KIAA1598; or one or more FGFR mutants including at least the fusion DTWD2-FGFR2; or one or more FGFR mutants including at least the fusion ESR2-FGFR2; or one or more FGFR mutants including at least the fusion FGFR2-MGEA5; or one or more FGFR mutants including at least the fusion FGFR2-SBNO2; or one or more FGFR mutants including at least the mutation FGFR2 C390>YS; or one or more FGFR mutants including at least the mutation FGFR2 N549K; in particular for the presence of one or more FGFR mutants including at least the FGFR2 C383R; and treating the patient with an FGFR inhibitor if one or more FGFR mutants as described above are present in the sample; in particular treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample.

Disclosed herein are methods of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least the mutation FGFR3 R397C; or one or more FGFR mutants including at least the mutation FGFR3 L608F; or one or more FGFR mutants including at least the fusion FGFR2-TACC2; and treating the patient with an FGFR inhibitor if one or more FGFR mutants as described above are present in the sample.

Disclosed herein are methods of treating cholangiocarcinoma in a patient harboring the FGFR2 SNP C383R, or harboring the fusion FGFR2-BICC1; or harboring the fusion FGFR2-CCAR1; or harboring the fusion FGFR2-KIAA1598; or harboring the fusion DTWD2-FGFR2; or harboring the fusion ESR2-FGFR2; or harboring the fusion FGFR2-MGEA5; or harboring the fusion FGFR2-SBNO2; or harboring the mutation FGFR2 C390>YS; or harboring the mutation FGFR2 N549K; in particular harboring FGFR2 C383R, comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants.

Disclosed herein are methods of treating cholangiocarcinoma in a patient harboring the mutation FGFR3 R397C, or harboring the mutation FGFR3 L608F, or harboring the fusion FGFR2-TACC2, comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring the FGFR2 SNP C383R, or harboring the fusion FGFR2-BICC1; or harboring the fusion FGFR2-CCAR1; or harboring the fusion FGFR2-KIAA1598; or harboring the fusion DTWD2-FGFR2; or harboring the fusion ESR2-FGFR2; or harboring the fusion FGFR2-MGEA5; or harboring the fusion FGFR2-SBNO2; or harboring the mutation FGFR2 C390>YS; or harboring the mutation FGFR2 N549K; in particular harboring FGFR2 C383R. The patient may comprise one or more further FGFR mutants.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring the mutation FGFR3 R397C, or harboring the mutation FGFR3 L608F, or harboring the fusion FGFR2-TACC2. The patient may comprise one or more further FGFR mutants.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring the FGFR2 SNP C383R, or harboring the fusion FGFR2-BICC1; or harboring the fusion FGFR2-CCAR1; or harboring the fusion FGFR2-KIAA1598; or harboring the fusion DTWD2-FGFR2; or harboring the fusion ESR2-FGFR2; or harboring the fusion FGFR2-MGEA5; or harboring the fusion FGFR2-SBNO2; or harboring the mutation FGFR2 C390>YS; or harboring the mutation FGFR2 N549K; in particular harboring FGFR2 C383R. The patient may comprise one or more further FGFR mutants.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring the mutation FGFR3 R397C, or harboring the mutation FGFR3 L608F, or harboring the fusion FGFR2-TACC2. The patient may comprise one or more further FGFR mutants.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least the FGFR2 SNP C383R; or one or more FGFR mutants including at least the fusion FGFR2-BICC1; or one or more FGFR mutants including at least the fusion FGFR2-CCAR1; or one or more FGFR mutants including at least the fusion FGFR2-KIAA1598; or one or more FGFR mutants including at least the fusion DTWD2-FGFR2; or one or more FGFR mutants including at least the fusion ESR2-FGFR2; or one or more FGFR mutants including at least the fusion FGFR2-MGEA5; or one or more FGFR mutants including at least the fusion FGFR2-SBNO2; or one or more FGFR mutants including at least the mutation FGFR2 C390>YS; or one or more FGFR mutants including at least the mutation FGFR2 N549K; in particular for the presence of one or more FGFR mutants including at least the FGFR2 C383R, wherein the presence of one or more FGFR mutants including at least the FGFR2 SNP C383R; or one or more FGFR mutants including at least the fusion FGFR2-BICC1; or one or more FGFR mutants including at least the fusion FGFR2-CCAR1; or one or more FGFR mutants including at least the fusion FGFR2-KIAA1598; or one or more FGFR mutants including at least the fusion DTWD2-FGFR2; or one or more FGFR mutants including at least the fusion ESR2-FGFR2; or one or more FGFR mutants including at least the fusion FGFR2-MGEA5; or one or more FGFR mutants including at least the fusion FGFR2-SBNO2; or one or more FGFR mutants including at least the mutation FGFR2 C390>YS; or one or more FGFR mutants including at least the mutation FGFR2 N549K; in particular wherein the presence of one or more FGFR mutants including at least the FGFR2 C383R is detected.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least the mutation FGFR3 R397C; or one or more FGFR mutants including at least the mutation FGFR3 L608F; or one or more FGFR mutants including at least the fusion FGFR2-TACC2; wherein the presence of one or more FGFR mutants including at least the mutation FGFR3 R397C; or one or more FGFR mutants including at least the mutation FGFR3 L608F; or one or more FGFR mutants including at least the fusion FGFR2-TACC2 is detected.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least the FGFR2 SNP C383R; or one or more FGFR mutants including at least the fusion FGFR2-BICC1; or one or more FGFR mutants including at least the fusion FGFR2-CCAR1; or one or more FGFR mutants including at least the fusion FGFR2-KIAA1598; or one or more FGFR mutants including at least the fusion DTWD2-FGFR2; or one or more FGFR mutants including at least the fusion ESR2-FGFR2; or one or more FGFR mutants including at least the fusion FGFR2-MGEA5; or one or more FGFR mutants including at least the fusion FGFR2-SBNO2; or one or more FGFR mutants including at least the mutation FGFR2 C390>YS; or one or more FGFR mutants including at least the mutation FGFR2 N549K; in particular for the presence of one or more FGFR mutants including at least the FGFR2 C383R, wherein the presence of one or more FGFR mutants including at least the FGFR2 SNP C383R; or one or more FGFR mutants including at least the fusion FGFR2-BICC1; or one or more FGFR mutants including at least the fusion FGFR2-CCAR1; or one or more FGFR mutants including at least the fusion FGFR2-KIAA1598; or one or more FGFR mutants including at least the fusion DTWD2-FGFR2; or one or more FGFR mutants including at least the fusion ESR2-FGFR2; or one or more FGFR mutants including at least the fusion FGFR2-MGEA5; or one or more FGFR mutants including at least the fusion FGFR2-SBNO2; or one or more FGFR mutants including at least the mutation FGFR2 C390>YS; or one or more FGFR mutants including at least the mutation FGFR2 N549K; in particular wherein the presence of one or more FGFR mutants including at least the FGFR2 C383R is detected.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least the mutation FGFR3 R397C; or one or more FGFR mutants including at least the mutation FGFR3 L608F; or one or more FGFR mutants including at least the fusion FGFR2-TACC2; wherein the presence of one or more FGFR mutants including at least the mutation FGFR3 R397C; or one or more FGFR mutants including at least the mutation FGFR3 L608F; or one or more FGFR mutants including at least the fusion FGFR2-TACC2 is detected.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

Reference to a particular numerical value includes at least that particular value, unless the context clearly dictates otherwise. When a range of values is expressed, another embodiment includes from the one particular value and/or to the other particular value. Further, reference to values stated in ranges include each and every value within that range. All ranges are inclusive and combinable.

The following abbreviations are used throughout the specification: FGFR (fibroblast growth factor receptor); FFPET (Formalin-Fixed Paraffin-Embedded Tissue); SNP (single nucleotide polymorphism).

As used herein, “treating” and like terms refer to reducing the severity and/or frequency of cancer symptoms, eliminating cancer symptoms and/or the underlying cause of said symptoms, reducing the frequency or likelihood of cancer symptoms and/or their underlying cause, and improving or remediating damage caused, directly or indirectly, by cancer.

“Biological samples” refers to any sample from a patient in which cancerous cells can be obtained and detection of a FGFR mutant is possible. Suitable biological samples include, but are not limited to, blood, lymph fluid, bone marrow, a solid tumor sample, or any combination thereof. In some embodiments, the biological sample can be FFPET.

FGFR Mutants

As used herein, the phrase “FGFR mutant” refers to a FGFR fusion gene, a FGFR single nucleotide polymorphism, a FGFR mutation or all of these. In an embodiment, the phrase “FGFR mutant” refers to a FGFR fusion gene, a FGFR single nucleotide polymorphism, or both. In an embodiment, the phrase “FGFR mutant” refers to a FGFR fusion gene. In an embodiment, the phrase “FGFR mutant” refers to a FGFR mutation.

“FGFR fusion” or “FGFR fusion gene” refers to a gene encoding FGFR (e.g., FGRF2 or FGFR3), or a portion thereof, and a fusion partner, or portion thereof, created by a translocation between the two genes. The presence of one or more FGFR fusion genes in a biological sample from a patient can be determined using the disclosed methods or using appropriate methods described in literature.

“FGFR single nucleotide polymorphism” (SNP) refers to a FGFR2 or FGFR3 gene in which a single nucleotide differs among individuals. A specific FGFR SNP in the methods of treatment or uses disclosed herein is FGFR2 C383R. The presence of one or more FGFR SNPs in a biological sample from a patient can be determined using the disclosed methods or using appropriate methods described in literature.

Whenever used herein FGFR2 SNP C383R or FGFR2 C383R denotes a FGFR2 mutation in which cysteine in position 383 is replaced by arginine. The terms may be used interchangeable.

FGFR Inhibitors for Use in the Disclosed Methods or Uses

Suitable FGFR inhibitors for use in the disclosed methods are provided herein.

In some embodiments, if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, the cholangiocarcinoma patient can be treated with a FGFR inhibitor disclosed in U.S. Publ. No. 2013/0072457 A1 (incorporated herein by reference), including any tautomeric or stereochemically isomeric form thereof, and a N-oxide thereof, a pharmaceutically acceptable salt thereof, or a solvate thereof (suitable R groups are also disclosed in U.S. Publ. No. 2013/0072457 A1). In some aspects, for example, the patient can be treated with N-(3,5-dimethoxy-phenyl)-N′-(1-methylethyl)-N-[3-(1-methyl-1H-pyrazol-4-yl)quinoxalin-6-yl]ethane-1,2-diamine (referred to herein as “JNJ-42756493” or “JNJ493” or erdafitinib):

including a N-oxide thereof, a pharmaceutically acceptable salt thereof, or a solvate thereof. In some aspects, the pharmaceutically acceptable salt is a HCl salt. In some aspects, the patient can be treated with JNJ493 base.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is N-[5-[2-(3,5-Di-methoxyphenyl)ethyl]-2H-pyrazol-3-yl]-4-(3,5-diemthylpiperazin-1-yl)benzamide (AZD4547), as described in Gavine, P. R., et al., AZD4547: An Orally Bioavailable, Potent, and Selective Inhibitor of the Fibroblast Growth Factor Receptor Tyrosine Kinase Family, Cancer Res. Apr. 15, 2012 72; 2045:

including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, and a N-oxide thereof, a pharmaceutically acceptable salt thereof, or a solvate thereof

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is 3-(2,6-Dichloro-3,5-dimethoxy-phenyl)-1-{6-[4-(4-ethyl-piperazin-1-yl)-phenylamino]-pyrimid-4-yl}-1-methyl-urea (NVP-BGJ398) as described in Int'l Publ. No. WO2006/000420:

including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, and a N-oxide thereof, a pharmaceutically acceptable salt thereof, or a solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is 4-amino-5-fluoro-3-[6-(4-methylpiperazin-1-yl)-1H-benzimidazol-2-yl]-1H-quinolin-2-one (dovitinib) as described in Int't Publ. No. WO2006/127926:

including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, and a N-oxide thereof, a pharmaceutically acceptable salt thereof, or a solvate thereof

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is 6-(7-((1-Amino-cyclopropyl)-methoxy)-6-methoxyquinolin-4-yloxy)-N-methyl-1-naphthamide (AL3810) (lucitanib; E-3810), as described in Bello, E. et al., E-3810 Is a Potent Dual Inhibitor of VEGFR and FGFR that Exerts Antitumor Activity in Multiple Preclinical Models, Cancer Res Feb. 15, 2011 71(A)1396-1405 and Int'l Publ. No. WO2008/112408:

including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, and a N-oxide thereof, a pharmaceutically acceptable salt thereof, or a solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is an anti-FGFR2 antibody such as that described in WO2013/076186.

Additional suitable FGFR inhibitors include BAY1163877 (Bayer), BAY1179470 (Bayer), TAS-120 (Taiho), ARQ087 (ArQule), ASP5878 (Astellas), FF284 (Chugai), FP-1039 (GSK/FivePrime), Blueprint, LY-2874455 (Lilly), RG-7444 (Roche), or any combination thereof, including, when chemically possible, any tautomeric or stereochemically isomeric forms thereof, N-oxides thereof, pharmaceutically acceptable salts thereof, or solvates thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is BAY1163877 (Bayer), including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, N-oxide thereof, pharmaceutically acceptable salt thereof, or solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is BAY1179470 (Bayer), including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, N-oxide thereof, pharmaceutically acceptable salt thereof, or solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is TAS-120 (Taiho), including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, N-oxide thereof, pharmaceutically acceptable salt thereof, or solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is ARQ087 (ArQule), including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, N-oxide thereof, pharmaceutically acceptable salt thereof, or solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is ASP5878 (Astellas), including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, N-oxide thereof, pharmaceutically acceptable salt thereof, or solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is FF284 (Chugai), including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, N-oxide thereof, pharmaceutically acceptable salt thereof, or solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is FP-1039 (GSK/FivePrime), including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, N-oxide thereof, pharmaceutically acceptable salt thereof, or solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is Blueprint, including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, N-oxide thereof, pharmaceutically acceptable salt thereof, or solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is LY-2874455 (Lilly), including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, N-oxide thereof, pharmaceutically acceptable salt thereof, or solvate thereof.

In some embodiments, the cholangiocarcinoma patient can be treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is RG-7444 (Roche), including, when chemically possible, any tautomeric or stereochemically isomeric form thereof, N-oxide thereof, pharmaceutically acceptable salt thereof, or solvate thereof.

Salts can be synthesized from a parent compound that contains a basic or acidic moiety by conventional chemical methods such as methods described in Pharmaceutical Salts: Properties, Selection, and Use, P. Heinrich Stahl (Editor), Camille G. Wermuth (Editor), ISBN: 3-90639-026-8, Hardcover, 388 pages, August 2002, which is incorporated herein by reference. Generally, such salts can be prepared by reacting the free acid or base forms of these compounds with the appropriate base or acid in water or in an organic solvent, or in a mixture of the two; generally, nonaqueous media such as ether, ethyl acetate, ethanol, isopropanol, or acetonitrile are used. The FGFR inhibitors for use in the disclosed methods may exist as mono- or di-salts depending upon the pKa of the acid from which the salt is formed.

Acid addition salts may be formed with a wide variety of acids, both inorganic and organic. Examples of acid addition salts include salts formed with an acid including, but not limited to, acetic, 2,2-dichloroacetic, adipic, alginic, ascorbic (e.g. L-ascorbic), L-aspartic, benzenesulphonic, benzoic, 4-acetamidobenzoic, butanoic, (+) camphoric, camphor-sulphonic, (+)-(1S)-camphor-10-sulphonic, capric, caproic, caprylic, cinnamic, citric, cyclamic, dodecylsulphuric, ethane-1,2-disulphonic, ethanesulphonic, 2-hydroxyethanesulphonic, formic, fumaric, galactaric, gentisic, glucoheptonic, D-gluconic, glucuronic (e.g. D-glucuronic), glutamic (e.g. L-glutamic), α-oxoglutaric, glycolic, hippuric, hydrobromic, hydrochloric, hydriodic, isethionic, lactic (e.g. (+)-L-lactic, (±)-DL-lactic), lactobionic, maleic, malic, (−)-L-malic, malonic, (±)-DL-mandelic, methanesulphonic, naphthalenesulphonic (e.g. naphthalene-2-sulphonic), naphthalene-1,5-disulphonic, 1-hydroxy-2-naphthoic, nicotinic, nitric, oleic, orotic, oxalic, palmitic, pamoic, phosphoric, propionic, L-pyroglutamic, pyruvic, salicylic, 4-amino-salicylic, sebacic, stearic, succinic, sulphuric, tannic, (+)-L-tartaric, thiocyanic, toluenesulphonic (e.g. p-toluenesulphonic), undecylenic and valeric acids, as well as acylated amino acids and cation exchange resins.

One particular group of salts consists of salts formed from acetic, hydrochloric, hydriodic, phosphoric, nitric, sulphuric, citric, lactic, succinic, maleic, malic, isethionic, fumaric, benzenesulphonic, toluenesulphonic, methanesulphonic (mesylate), ethanesulphonic, naphthalenesulphonic, valeric, propanoic, butanoic, malonic, glucuronic and lactobionic acids. Another group of acid addition salts includes salts formed from acetic, adipic, ascorbic, aspartic, citric, DL-Lactic, fumaric, gluconic, glucuronic, hippuric, hydrochloric, glutamic, DL-malic, methanesulphonic, sebacic, stearic, succinic and tartaric acids.

If the compound is anionic, or has a functional group which may be anionic (e.g., —COOH may be —COO⁻), then a salt may be formed with a suitable cation. Examples of suitable inorganic cations include, but are not limited to, alkali metal ions such as Na⁺ and K⁺, alkaline earth metal cations such as Ca²⁺ and Mg²⁺, and other cations such as Al³⁺. Examples of suitable organic cations include, but are not limited to, ammonium ion (i.e., NH₄ ⁺) and substituted ammonium ions (e.g., NH₃R⁺, NH₂R₂ ⁺, NHR₃ ⁺, NR₄ ⁺).

Examples of some suitable substituted ammonium ions are those derived from: ethylamine, diethylamine, dicyclohexylamine, triethylamine, butylamine, ethylenediamine, ethanolamine, diethanolamine, piperazine, benzylamine, phenylbenzylamine, choline, meglumine, and tromethamine, as well as amino acids, such as lysine and arginine. An example of a common quaternary ammonium ion is N(CH₃)₄ ⁺.

Where the compounds contain an amine function, these may form quaternary ammonium salts, for example by reaction with an alkylating agent according to methods well known to the skilled person. Such quaternary ammonium compounds are within the scope of the disclosed compounds. Compounds containing an amine function may also form N-oxides. A reference herein to a compound that contains an amine function also includes the N-oxide. Where a compound contains several amine functions, one or more than one nitrogen atom may be oxidised to form an N-oxide. Particular examples of N-oxides are the N-oxides of a tertiary amine or a nitrogen atom of a nitrogen-containing heterocycle. N-Oxides can be formed by treatment of the corresponding amine with an oxidizing agent such as hydrogen peroxide or a per-acid (e.g. a peroxycarboxylic acid), see for example Advanced Organic Chemistry, by Jerry March, 4^(th) Edition, Wiley Interscience, pages. More particularly, N-oxides can be made by the procedure of L. W. Deady (Syn. Comm. (1977), 7, 509-514) in which the amine compound is reacted with m-chloroperoxybenzoic acid (MCPBA), for example, in an inert solvent such as dichloromethane.

As used herein, the term “solvate” means a physical association of the compound with one or more solvent molecules. This physical association involves varying degrees of ionic and covalent bonding, including hydrogen bonding. In certain instances the solvate will be capable of isolation, for example when one or more solvent molecules are incorporated in the crystal lattice of the crystalline solid. The term “solvate” is intended to encompass both solution-phase and isolatable solvates. Non-limiting examples of suitable solvates include the disclosed compounds in combination with water, isopropanol, ethanol, methanol, DMSO, ethyl acetate, acetic acid, ethanolamine and the like. The compound may exert its biological effects while in solution.

Solvates are well known in pharmaceutical chemistry. They can be important to the processes for the preparation of a substance (e.g. in relation to their purification), the storage of the substance (e.g. its stability) and the ease of handling of the substance, and are often formed as part of the isolation or purification stages of a chemical synthesis. A person skilled in the art can determine by means of standard and long used techniques whether a hydrate or other solvate has formed by the isolation conditions or purification conditions used to prepare a given compound. Examples of such techniques include thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray crystallography (e.g. single crystal X-ray crystallography or X-ray powder diffraction) and Solid State NMR (SS-NMR, also known as Magic Angle Spinning NMR or MAS-NMR). Such techniques are as much a part of the standard analytical toolkit of the skilled chemist as NMR, IR, HPLC and MS. Alternatively the skilled person can deliberately form a solvate using crystallisation conditions that include an amount of the solvent required for the particular solvate. Thereafter the standard methods described above, can be used to establish whether solvates had formed. Also encompassed are any complexes (e.g. inclusion complexes or clathrates with compounds such as cyclodextrins, or complexes with metals) of the FGFR inhibitor.

Furthermore, the compound may have one or more polymorph (crystalline) or amorphous forms.

The compounds include compounds with one or more isotopic substitutions, and a reference to a particular element includes within its scope all isotopes of the element. For example, a reference to hydrogen includes within its scope ¹H, ²H (D), and ³H (T). Similarly, references to carbon and oxygen include within their scope respectively ¹²C, ¹³C and ¹⁴C and ¹⁶O and ¹⁸O. The isotopes may be radioactive or non-radioactive. In one embodiment, the compounds contain no radioactive isotopes. Such compounds are preferred for therapeutic use. In another embodiment, however, the compound may contain one or more radioisotopes. Compounds containing such radioisotopes may be useful in a diagnostic context.

In some embodiments, the cholangiocarcinoma patient is treated with a FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample, wherein the FGFR inhibitor is N-(3,5-dimethoxyphenyl)-N′-(1-methylethyl)-N-[3-(1-methyl-1H-pyrazol-4-yl)quinoxalin-6-yl]ethane-1,2-diamine (referred to herein “JNJ-42756493”), or a pharmaceutically acceptable salt thereof or a solvate thereof. In an embodiment the FGFR inhibitor is JNJ-42756493 base.

Methods of Treating Cancer in a Patient

Disclosed herein are methods of treating cholangio carcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least the FGFR2 SNP C383R; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least the FGFR2 SNP C383R are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangio carcinoma in a patient harboring the FGFR2 SNP C383R comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring the FGFR2 SNP C383R. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring the FGFR2 SNP C383R. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least the FGFR2 SNP C383R, wherein the presence of one or more FGFR mutants including at least the FGFR2 SNP C383R is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least the FGFR2 SNP C383R, wherein the presence of one or more FGFR mutants including at least the FGFR2 SNP C383R is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment, erdafitinib is administered at a dose of 10 mg.

In an embodiment, erdafitinib is administered at a dose of 10 mg intermittently.

In an embodiment, erdafitinib is administered at a dose of 10 mg intermittently 7 days on/7 days off.

In an embodiment, erdafitinib is administered at a dose of 8 mg, in particular 8 mg once daily. In an embodiment, erdafitinib is administered at a dose of 8 mg, in particular 8 mg once daily, with an option to uptitrate to 9 mg depending on serum phosphate levels (e.g. serum phosphate levels are <5.5 mg/dL, or are <7 mg/dL or range from and include 7 mg/dL to ≤9 mg/dL or are ≤9 mg/dL), and depending on treatment-related adverse events observed. In an embodiment, the levels of serum phosphate for determining whether or not to up-titrate are measured on a treatment day during the first cycle of erdafitinib treatment, in particular on day 14±2 days, more in particular on day 14, of erdafitinib administration.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR fusion FGFR2-BICC1.

Disclosed herein are methods of treating cholangio carcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least FGFR2-BICC1; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least FGFR2-BICC1 are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangio carcinoma in a patient harboring FGFR2-BICC1 comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring FGFR2-BICC1. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR2-BICC1. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-BICC1, wherein the presence of one or more FGFR mutants including at least FGFR2-BICC1 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-BICC1, wherein the presence of one or more FGFR mutants including at least FGFR2-BICC1 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR fusion FGFR2-CCAR1.

Disclosed herein are methods of treating cholangio carcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least FGFR2-CCAR1; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least FGFR2-CCAR1 are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangio carcinoma in a patient harboring FGFR2-CCAR1 comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring FGFR2-CCAR1. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR2-CCAR1. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-CCAR1, wherein the presence of one or more FGFR mutants including at least FGFR2-CCAR1 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-CCAR1, wherein the presence of one or more FGFR mutants including at least FGFR2-CCAR1 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR fusion FGFR2-KIAA1598.

Disclosed herein are methods of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least FGFR2-KIAA1598; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least FGFR2-KIAA1598 are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangiocarcinoma in a patient harboring FGFR2-KIAA1598 comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring FGFR2-KIAA1598. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR2-KIAA1598. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-KIAA1598, wherein the presence of one or more FGFR mutants including at least FGFR2-KIAA1598 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-KIAA1598, wherein the presence of one or more FGFR mutants including at least FGFR2-KIAA1598 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR fusion DTWD2-FGFR2.

Disclosed herein are methods of treating cholangio carcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least DTWD2-FGFR2; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least DTWD2-FGFR2 are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangio carcinoma in a patient harboring DTWD2-FGFR2 comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring DTWD2-FGFR2. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR2-DTWD2-FGFR2. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least DTWD2-FGFR2, wherein the presence of one or more FGFR mutants including at least DTWD2-FGFR2 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least DTWD2-FGFR2, wherein the presence of one or more FGFR mutants including at least DTWD2-FGFR2 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR fusion ESR2-FGFR2.

Disclosed herein are methods of treating cholangio carcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least ESR2-FGFR2; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least ESR2-FGFR2 are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangiocarcinoma in a patient harboring ESR2-FGFR2 comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring ESR2-FGFR2. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring ESR2-FGFR2. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least ESR2-FGFR2, wherein the presence of one or more FGFR mutants including at least ESR2-FGFR2 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least ESR2-FGFR2, wherein the presence of one or more FGFR mutants including at least ESR2-FGFR2 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR fusion FGFR2-MGEA5.

Disclosed herein are methods of treating cholangio carcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least FGFR2-MGEA5; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least FGFR2-MGEA5 are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangiocarcinoma in a patient harboring FGFR2-MGEA5 comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring FGFR2-MGEA5. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR2-MGEA5. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-MGEA5, wherein the presence of one or more FGFR mutants including at least FGFR2-MGEA5 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-MGEA5, wherein the presence of one or more FGFR mutants including at least FGFR2-MGEA5 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR fusion FGFR2-SBNO2.

Disclosed herein are methods of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least FGFR2-SBNO2; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least FGFR2-SBNO2 are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangiocarcinoma in a patient harboring FGFR2-SBNO2 comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring FGFR2-SBNO2. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR2-SBNO2. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-SBNO2, wherein the presence of one or more FGFR mutants including at least FGFR2-SBNO2 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-SBNO2, wherein the presence of one or more FGFR mutants including at least FGFR2-SBNO2 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR mutation FGFR2 C390>YS.

Disclosed herein are methods of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least FGFR2 C390>YS; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least FGFR2 C390>YS are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangiocarcinoma in a patient harboring FGFR2 C390>YS comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring FGFR2 C390>YS. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR2 C390>YS. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2 C390>YS, wherein the presence of one or more FGFR mutants including at least FGFR2 C390>YS is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2 C390>YS, wherein the presence of one or more FGFR mutants including at least FGFR2 C390>YS is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR mutation FGFR2 N549K.

Disclosed herein are methods of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least FGFR2 N549K; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least FGFR2 N549K are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangio carcinoma in a patient harboring FGFR2 N549K comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring FGFR2 N549K. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR2 N549K. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2 N549K, wherein the presence of one or more FGFR mutants including at least FGFR2 N549K is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2 N549K, wherein the presence of one or more FGFR mutants including at least FGFR2 N549K is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR mutation FGFR3 R397C.

Disclosed herein are methods of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least FGFR3 R397C; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least FGFR3 R397C are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangiocarcinoma in a patient harboring FGFR3 R397C comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring FGFR3 R397C. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR3 R397C. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR3 R397C, wherein the presence of one or more FGFR mutants including at least FGFR3 R397C is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR3 R397C, wherein the presence of one or more FGFR mutants including at least FGFR3 R397C is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR mutation FGFR3 L608F.

Disclosed herein are methods of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least FGFR3 L608F; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least FGFR3 L608F are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangiocarcinoma in a patient harboring FGFR3 L608F comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring FGFR3 L608F. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR3 L608F. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR3 L608F, wherein the presence of one or more FGFR mutants including at least FGFR3 L608F is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR3 L608F, wherein the presence of one or more FGFR mutants including at least FGFR3 L608F is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment of the invention, in the methods of treatment and the uses as described herein the FGFR2 SNP C383R may be replaced by the FGFR fusion FGFR2-TACC2.

Disclosed herein are methods of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least FGFR2-TACC2; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least FGFR2-TACC2 are present in the sample. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein are methods of treating cholangiocarcinoma in a patient harboring FGFR2-TACC2 comprising administering a FGFR inhibitor to said patient. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient harboring FGFR2-TACC2. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor in the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient harboring FGFR2-TACC2. The patient may comprise one or more further FGFR mutants. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is a FGFR inhibitor for use in the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-TACC2, wherein the presence of one or more FGFR mutants including at least FGFR2-TACC2 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

Disclosed herein is the use of a FGFR inhibitor for the manufacture of a medicament for the treatment of cholangiocarcinoma in a patient wherein the patient is identified as being responsive or likely to respond to the treatment with the FGFR inhibitor by evaluating a biological sample obtained from the patient for the presence of one or more FGFR mutants including at least FGFR2-TACC2, wherein the presence of one or more FGFR mutants including at least FGFR2-TACC2 is detected. In an embodiment, the FGFR inhibitor is erdafitinib.

In an embodiment, the proportion of cholangiocarcinoma patients, in particular advanced cholangiocarcinoma patients, with at least one of the FGFR mutants as described herein showing objective response rate is at least 15%, or 20%, or 25%, or 30%, or 35%, or 40%, or 45%, or above 45%.

In an embodiment, the proportion of cholangiocarcinoma patients, in particular advanced cholangiocarcinoma patients, with at least one of the FGFR mutants as described herein showing objective response rate, in particular ORR (CR+PR+ uCR+ uPR), is at least 46%, or 47%, or 48%, or 49%, or 50%, or 51%, or 52%, or 53%, or 54%, or above 54%.

Methods of identification and analysis of FGFR mutants such as for example the FGFR2 SNP C383R can be performed using techniques known to a person skilled in the art and as described herein such as reverse-transcriptase polymerase chain reaction (RT-PCR) or in-situ hybridization such as fluorescence in situ hybridization (FISH). The diagnostic tests and screens are typically conducted on a biological sample selected from tumour biopsy samples, blood samples (isolation and enrichment of shed tumour cells), or as described hereinabove. The screening process will typically involve direct sequencing, oligonucleotide microarray analysis, or a mutant specific antibody.

In screening by RT-PCR, the level of mRNA in the tumour is assessed by creating a cDNA copy of the mRNA followed by amplification of the cDNA by PCR. Methods of PCR amplification, the selection of primers, and conditions for amplification, are known to a person skilled in the art. Nucleic acid manipulations and PCR are carried out by standard methods, as described for example in Ausubel, F. M. et al., eds. (2004) Current Protocols in Molecular Biology, John Wiley & Sons Inc., or Innis, M. A. et al., eds. (1990) PCR Protocols: a guide to methods and applications, Academic Press, San Diego. Reactions and manipulations involving nucleic acid techniques are also described in Sambrook et al., (2001), 3^(rd) Ed, Molecular Cloning: A Laboratory Manual, Cold Spring Harbor Laboratory Press. Alternatively a commercially available kit for RT-PCR (for example Roche Molecular Biochemicals) may be used, or methodology as set forth in U.S. Pat. Nos. 4,666,828; 4,683,202; 4,801,531; 5,192,659, 5,272,057, 5,882,864, and 6,218,529 and incorporated herein by reference. An example of an in-situ hybridisation technique for assessing mRNA expression would be fluorescence in-situ hybridisation (FISH) (see Angerer (1987) Meth. Enzymol., 152: 649).

Generally, in situ hybridization comprises the following major steps: (1) fixation of tissue to be analyzed; (2) prehybridization treatment of the sample to increase accessibility of target nucleic acid, and to reduce nonspecific binding; (3) hybridization of the mixture of nucleic acids to the nucleic acid in the biological structure or tissue; (4) post-hybridization washes to remove nucleic acid fragments not bound in the hybridization, and (5) detection of the hybridized nucleic acid fragments. The probes used in such applications are typically labelled, for example, with radioisotopes or fluorescent reporters. Preferred probes are sufficiently long, for example, from about 50, 100, or 200 nucleotides to about 1000 or more nucleotides, to enable specific hybridization with the target nucleic acid(s) under stringent conditions. Standard methods for carrying out FISH are described in Ausubel, F. M. et al., eds. (2004) Current Protocols in Molecular Biology, John Wiley & Sons Inc and Fluorescence In Situ Hybridization: Technical Overview by John M. S. Bartlett in Molecular Diagnosis of Cancer, Methods and Protocols, 2nd ed.; ISBN: 1-59259-760-2; March 2004, pps. 077-088; Series: Methods in Molecular Medicine.

Mutations and fusions are described herein with reference to the reference sequence NCBI Reference Sequence: NM 000141.4 and its corresponding amino acid sequence. FGFR2 C383R denotes an FGFR2 mutation in which cysteine in position 383 is replaced by arginine. FGFR2 C390>YS describes an FGFR2 mutation in which cysteine in position 390 is replaced by tyrosine and serine. FGFR2 N549K describes an FGFR2 mutation in which asparagine in position 549 is replaced by lysine. FGFR2-KIAA1598 is a 5′-FGFR2 (ex1-17)-KIAA1598 (ex7-15)-3′ fusion with REARR-POS1 chr10:123242270-123242562 and REARR-P052 chr10:118709031-118709262 or with REARR-POS1 chr10:123242809-123243080 and REARR-POS2 chr10:118710247-118710599. DTWD2-FGFR2 is a 5′-DTWD2(ex1)-FGFR2(ex18)-3′ fusion with REARR-POS1 chr10:123242450-123242723 and REARR-P052 chr5:118322151-118322550. ESR2-FGFR2 is a 5′-ESR2 (ex1-3)-FGFR2 (ex18)-3′ fusion with REARR-POS1 chr10:123239893-123240042 and REARR-P052 chr14:64740210-64740315 FGFR2-MGEA5 is a 5′-FGFR2(ex1-17)-MGEA5(ex11-16)-3′ fusion with REARR-POS1 chr10:123241032-123241358 and REARR-P052 chr10:103557129-103557439. FGFR2-BICC1 is a 5′-FGFR2(ex1-17)-BICC1(ex3-21)-3′ fusion with REARR-POS1 chr10:123242218-123242771 and REARR-P052 chr10:60445416-60445560. FGFR2-SBNO2 is a 5′-FGFR2(x18)-SBNO2(x19-32)-3′ fusion with REARR-POS1 chr10:123240725-123240921 and REARR-P052 chr19:1113573-1113710; FGFR3 R397C describes an FGFR3 mutation in which Arginine in position 397 is replaced by Cysteine. FGFR3 L608F describes an FGFR3 mutation in which Leucine in position 608 is replaced by phenylalanine. FGFR2-TACC2 is a 5′-FGFR2(ex1-17)-TACC2(ex11-17)-3′ fusion with REARR-POS1 chr10:123240606-123240922 and REARR-P052 chr10:123994680-123994992.

Examples

1) Treatment of Patients with Cholangiocarcinoma

A clinical trial was conducted in which patients age ≥18 years were enrolled with advanced solid tumours for which standard curative therapy was no longer effective (NCT01703481; 4 part study).

-   -   Dose escalation (Part 1, all comers) followed a 3+3 design, with         patients receiving ascending doses of erdafitinib at 0.5, 2, 4,         6, 9, and 12 mg QD (21-day cycles).     -   After daily dose escalation (Part 1), two intermittent doses         were also evaluated at 10 and 12 mg 7 days on/7 days off (28-day         cycles).     -   Subsequent parts (Parts 2-4) required documented FGFR-biomarker         positive disease.     -   Part 2 (pharmacodynamics cohort, all comers) and Part 3         (dose-expansion cohort for recommended phase 2 dose of 9 mg QD,         cholangiocarcinoma in addition to other cancers):     -   Tumors were required to be KRAS wild type and have any of the         following: FGFR amplifications, FGFR activating mutations, FGFR         translocations, or other aberrations of FGFR activation.     -   Part 4 (dose-expansion cohort for 10 mg intermittently,         cholangiocarcinoma in addition to other cancers):     -   Tumors were required to have FGFR activating mutations or FGFR         translocations.     -   Serial blood samples were collected to measure erdafinitib         concentrations in plasma in Parts 1 and 2. Sparse samples were         collected in Parts 3 and 4.

Results

Eleven patients with FGFR-aberrant cholangiocarcinoma were treated at 9 mg QD (n=1, Part 3) or 10 mg intermittent (n=10, Part 4).

Of the 11 patients: 3 (27.3%) harbored FGFR mutations, and 8 (72.7%) harbored translocations.

Median treatment duration was 5.3 mo (range, 1 to 16 mo).

Patients received a median of 6 cycles (range, 2 to 17).

Most patients had received ≥6 cycles (8/11; 72.7%), including 4 (36.4%) treated with ≥9 cycles.

Systemic erdafitinib exposure in cholangiocarcinoma patients was similar to patients in all other cancer indications in this study.

Of the 3 partial responses, 1 patient had a FGFR mutation (FGFR2 C383R) and 2 had FGFR translocations (fusions of FGFR2-BICC1 [n=1] and FGFR2-CCAR1 [n=1]).

Overall disease control rate, including stable disease, was 54.5% (6/11).

With a median follow-up of 5.5 mo:

-   -   Median duration of response was 11.4 mo (95% CI, 9.9 to 12.9         mo).     -   Median progression-free survival was 5.1 mo (95% CI 1.6 to 11.8         mo).         -   6- and 9-mo progression-free survival rates were 36% and             24%, respectively.     -   As of the cutoff date, 1 patient continues on study treatment.

The objective response rate was 27.3% with a median duration of response of 11.4 months for erdafitinib 9 mg QD or 10 mg intermittent in this heavily pretreated population, with all responses seen at the latter dosing schedule.

The disease control rate was 54.5%.

Safety and PK data were consistent with those from the previously published results from Part 1 of this study (Tabernero J, et al: J Clin Oncol 33:3401-3408, 2015).

2) Treatment of Patients with Cholangiocarcinoma

A Study to evaluate the clinical efficacy of JNJ-42756493 (Erdafitinib), in Asian participants with advanced Non-Small-Cell Lung Cancer, Urothelial Cancer, Esophageal Cancer or Cholangiocarcinoma. (NCT02699606; LUC2001).

LUC2001 is an open-label, multicenter, phase 2a study including advanced cholangiocarcinoma subjects with FGFR alterations, based on FoundationOne testing, who failed at least 1 prior systemic treatment. The primary endpoint is objective response rate (ORR; by Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1). The secondary endpoints are disease control rate (DCR), safety and pharmacokinetics. Disease is evaluated every 8 weeks until disease progression (PD). Participants receive 8 mg erdafitinib starting dose once daily with option to uptitrate to 9 mg on a 28-day cycle. The dose of the drug may be modified, delayed, or terminated based on guidelines in the protocol.

Inclusion Criteria:

-   -   Pathologically or cytologically confirmed, advanced or         refractory tumors (there are no restriction on the total number         of lines of prior therapies, but participant should have         received at least 1 line of anti-cancer therapy [as per local         standard of care]): Squamous and non-squamous non-small-cell         lung cancer (NSCLC), esophageal cancer, urothelial cancer and         cholangiocarcinoma     -   Participants must meet the following molecular eligibility         criteria (diagnosed at a central or local laboratory using         either a tumor tissue based assay, which must indicate: at least         one of following): a) fibroblast growth factor receptor (FGFR)         gene translocations b) FGFR gene mutations that are considered         activating c) Participants with evidence of FGFR pathway         activation or other potential target/pathway inhibited by         erdafitinib may also be considered and allowed for enrollment if         supported by emerging biomarker data.     -   The presence of measurable disease according to the Response         Evaluation Criteria in Solid Tumors (RECIST, Version 1.1)         Criteria, and documented disease progression as defined by         RECIST (Version 1.1) at baseline     -   Eastern Cooperative Oncology Group (ECOG) performance status         score 0 or 1

Female participants (of child bearing potential and sexually active) and male participants (with a partner of child bearing potential) must use medically acceptable methods of birth control. Male participants must use highly effective birth control measurements when sexually active and must not donate sperm

Adequate bone marrow, liver, and renal function within the 14 days prior to Day 1 of Cycle 1 up until pre-dose of Cycle 1

Exclusion Criteria:

-   -   Chemotherapy, targeted therapies, immunotherapy, or treatment         with an investigational anticancer agent within 2 weeks or at         least 5 half-lives of the drug whichever is longer up to a         maximum of 4 weeks before the first administration of study         drug. Localized palliative radiation therapy (but should not         include radiation to target lesions) and ongoing luteinizing         hormone-releasing hormone (LHRH) agonists, bisphosphonates and         denosumab, are permitted     -   Participants with persistent phosphate greater than (>) upper         limit of normal (ULN) during Screening (within 14 days prior to         Day 1 of Cycle 1 up until pre-dose of Cycle 1) and despite         medical management of phosphate levels

Participants taking medications known to have a significant risk of causing QTc prolongation and Torsades de Pointes. Participants who have discontinued any of these medications must have a wash-out period of at least 5 days or at least 5 half-lives of the drug (whichever is longer) prior to the first dose of study drug

Left ventricular ejection fraction (LVEF) less than (<) 50% as assessed by echocardiography (or multi-gated acquisition [MUGA]) performed at Screening

-   -   Uncontrolled inter-current illness including, but not limited         to, poorly controlled hypertension or diabetes, ongoing active         infection requiring antibiotics, psychiatric illness,         uncontrolled cardiovascular disease, or at risk of         gastrointestinal perforation as per investigators' assessment     -   Received prior selective FGFR inhibitor treatment or RET         inhibitor treatment, respectively according to the biomarker         prescreening result, or if the participant has known allergies,         hypersensitivity, or intolerance to Erdafitinib or its         excipients

Any corneal or retinal abnormality likely to increase risk of eye toxicity

All sexes Eligible for Study. Particpants are 18 years and older.

Advanced cholangiocarcinoma patients who progressed after first-line chemotherapy have limited treatment options and poor prognosis.

Preliminary Results (Snapshot): As of 20 Mar. 2018, 150 advanced cholangiocarcinoma patients were molecularly screened and 25 had FGFR alterations, of whom 11 were dosed with 8 mg qd erdafitinib, all response evaluable. Median age was 53.0 years and ECOG score 0/1 in 6 and 5 subjects respectively. Median number of treatment cycles was 4.0 and median treatment duration was 3.5 months. There were 3 partial response (PR), 2 unconfirmed PR (uPR), 4 stable disease (SD), and 2 PD. The ORR (CR+PR+ uCR+ uPR) is 45.5%. The DCR (CR+PR+ uCR+ uPR+SD) is 81.8%. Six subjects are still on treatment. All subjects experienced AEs, 7 experienced Grade 3 or worse AEs, 3 experienced serious AEs (SAES) with no drug related SAE, all had AEs leading to drug interruption, 3 had AEs leading to dose reduction, while no AE led to treatment discontinuation or death. The most common AEs (>30%) were hyperphosphatemia (8/11), dry mouth (7/11), stomatitis (7/11), diarrhea (4/11), nail disorder (4/11), and palmar-plantar erythrodysaesthesia syndrome (4/11).

The participants with confirmed or unconfirmed partial response include participants with FGFR2-KIAA1598 and DTWD2-FGFR2 fusions, with ESR2-FGFR2 fusion, with FGFR2 C390>YS mutation and with FGFR2-MGEA5 fusion.

The participants with stable disease include participants with FGFR2-BICC1 fusion, with FGFR2 fusion with SBNO2 partner, with FGFR2 N549K mutation, and with FGFR2-KIAA1598 fusion.

Conclusion: PK characteristics are consistent with data from other erdafitinib studies. Erdafitinib showed encouraging clinical activity and tolerable safety profile in patients with FGFR-aberrant advanced cholangiocarcinoma.

As of 20 Aug. 2018, 193 advanced CCA (cholangiocarcinoma) patients were molecularly screened; 29 had FGFR alterations, of whom 12 (with 7 FGFR2 fusion, 3 FGFR2 mutation, and 2 FGFR3 mutation) were dosed with continuous 8 rng once daily erdafitinib (one patient was uptitrated to 9 mg dose), 11 of them were response evaluable. Median number of erdafitinib treatment cycles was 7.0 (range: 2; 19) and median treatment duration was 6.34 (range: 1.6; 17.5) months.

All 11 patients received prior systemic therapy, 4 patients (36.4%) were exposed to prior radiotherapy, and 6 patients (54.5%) underwent cancer-related surgery before study entry.

At baseline, 4 patients received 1 prior chemotherapy, 4 patients received 2 prior chemotherapies, and 3 patients underwent ≥3 prior chemotherapies.

8 patients were treated with gemcitabine+cisplatin therapy, and 11 patients were treated by cisplatin/oxaliplatin/carboplatin-based chemotherapy.

Study Assessment

Tumor assessments: Conducted every 8 (±1) weeks up to 1 year from start of study drug, then every 12 (±1) weeks thereafter until the patient dies, or withdrawal of consent or conclusion of the study, whichever occurs first.

Treatment-emergent adverse events (TEAEs): TEAEs were collected from the day of the full study informed consent form signing to the End-of-Treatment (EOT) visit. TEAEs and serious TEAEs will be collected up to 30 (+7) days after last dose (EOT).

Pharmacokinetic assessment: Blood samples for determination of plasma concentrations of erdafitinib were collected on cycle 1 through 4, at various time points.

Pharmacodynamic and safety: Serum phosphate concentration was continuously monitored as a pharmacodynamic endpoint during the study to facilitate dose adjustment per protocol specification. Serum phosphate was measured on cycle 1 day 14 for pharmacodynamic uptitration. On study, serum phosphate concentration was set to be below 7 mg/dL in order to avoid prolonged hyperphosphatemia.

Exploratory biomarker assessment: Tumor tissue and blood were collected for exploratory biomarker assessment.

Statistical Analysis

ORR (complete response [CR] or partial response [PR]) and disease control rate (DCR) was calculated with 95% CI.

PFS was represented with descriptive summary statistics; Kaplan-Meier method was used for evaluation.

Post hoc visual predictive check was performed on an existing population PK model, built with data from 373 patients with various tumor types (majority were caucasians). Post hoc visual predictive check was performed on serum phosphate concentration data based on an existing population PK/PD model.

Biomarker analysis was performed to study the association between the predictive markers and clinical responses and PFS.

The ORR—Objective Response Rate (CR+PR) is 45.5% (n=5), 95% CI of ORR^(a) is (16.7;76.6). The ORR (CR+PR+ uCR+ uPR) is 54.5% (n=6), 95% CI of ORR^(a) is (23.4; 83.3). The Disease Control Rate-DCR (CR+PR+SD) is 72.7% (n=8), 95% CI of DCR^(a) is (39.0; 94.0). The DCR (CR+PR+ uCR+ uPR+SD) is 81.8% (n=9), 95% CI of DCR^(a) is (48.2; 97.7).

^(a) 95% confidence interval (CI) is calculated using Clopper-Pearson method. CR and PR: confirmed by repeat assessments ≥4 weeks from the initial observation. Patient classified as uCR or uPR (unconfirmed CR or PR) if only one assessment of CR or PR has been observed. To qualify as SD, follow-up measurements must have met the SD criteria at least once at a minimum interval not ≥6 weeks after the first dose of study agent. CR, Complete response; PR, Partial response; PD, Progressive disease; QD, Once daily; SD, Stable disease.

There are 5 confirmed PR (all FGFR2 alteration [1 mutation and 4 fusions]),

1—unconfirmed PR (FGFR2 fusion), 3 stable disease (SD; FGFR2 fusion), and 2—progressive disease (PD; both with FGFR3 mutations and concurrent KRAS mutations).

The median duration of response (DOR) was 3.94 months (95% CI: 3.65; 12.16). Median (95% CI) PFS (progression free survival) was 5.59 months (1.87, NE) and 9-months PFS rate (95% CI) was 40% (11; 68)

Among patients with FGFR2 alteration (n=9), 9-months PFS rate was 49%, ORR (CR+PR+ uCR+ uPR) and DCR were 66.7% and 100%, respectively.

All patients experienced drug-related TEAEs (treatment-emergent adverse events), with 6/11 patients reporting Grade 3 or higher TEAEs.

The most common TEAEs were hyperphosphatemia, dry mouth, stomatitis, dry skin, nail disorder, and palmar-plantar erythrodysaesthesia syndrome.

Drug-related TEAEs leading to dose reduction were observed in 5 patients (45.5%) and drug-related TEAEs leading to dose interruption were reported in 11 patients (100%). Serious TEAEs (not drug-related) were observed in 3 patients (27.3%): upper gastrointestinal haemorrhage, pyelonephritis acute and pathological fracture, n=1 each. Six patients (54.5%) experienced Grade 3 or higher drug-related TEAEs, while no AE led to treatment discontinuation or death.

TABLE 1 Summary of adverse drug reaction results Erdafitinib 8 mg (QD) N = 11 Any grade (N) ≥Grade 3(N) Patients with 11 6 drug-related TEAEs Drug-related TEAEs Hyperphosphataemia 10 Dry mouth  8 1 Stomatitis  8 2 Dry skin  5 1 Nail disorder  4 1 Palmar-plantar  4 erythrodysaesthesia syndrome Diarrhoea  3 Constipation  3 Paronychia  3 1 Decreased appetite  3 Onychomycosis  2 Alanine  2 aminotransferase increased Aspartate  2 aminotransferase increased Nail discolouration  2 1 Dry eye  2 Punctate keratitis  2 Nausea  2 Onycholysis  1 1 Hyponatremia  1 1

One PR patient with a FGFR2-KIAA1598 fusion (confirmed in both tumor and cfDNA analysis) experienced maximum tumor shrinkage (−46.2%); PFS duration was 5.59 months. The FGFR2-KIAA1598 fusion allele fraction decreased and was not detectable at C3D1 and C6D1 with treatment but rose with disease progression. Analysis of the post-progression cfDNA showed a secondary FGFR2 kinase domain mutation, V564L.

This gatekeeper mutation was not detected in the baseline plasma or tumor tissue, which suggests this mutation represents a mechanism of acquired resistance to FGFR inhibition.

TABLE 2 Clinically acquired resistance to erdafitinib based on cfDNA analysis Patient harboring FGFR2-KIAA1598 with maximum tumor shrinkage (−46.2%) Pretreatment C3D1 C6D1 Post-progression Plasma Plasma Plasma Plasma (C1D1) FGFR2- FGFR2- FGFR2-KIAA1598 FGFR2- KIAA1598 KIAA1598 (0.88%)* KIAA1598 (−) (−) FGFR2 V564L (0.92%)* (0.66%)* Archived tumor FGFR2- KIAA1598 (−) Note: FGFR-related genetic events are detected by FoundationOne NGS assay (tissue) or the Guardant360 assay (Plasma). cfDNA, circulating-cell free Deoxyribonucleic acid; C1D1, cycle 1 day 1; C3D1, cycle 3 day 1; C6D1, cycle 6 day 1, *indicates allele frequency

Conclusion: The results of PK and PK/PD relationship in Asian patients with advanced CCA are consistent with that known from patients with other types of solid tumor and different ethnic background, supporting the selected dose for patients with advanced CCA. 

1. A method of treating cholangiocarcinoma in a patient comprising: evaluating a biological sample from the patient for the presence of one or more FGFR mutants including at least the mutation FGFR3 R397C; or one or more FGFR mutants including at least the mutation FGFR3 L608F; or one or more FGFR mutants including at least the fusion FGFR2-TACC2; and treating the patient with an FGFR inhibitor if one or more FGFR mutants including at least the mutation FGFR3 R397C; or one or more FGFR mutants including at least the mutation FGFR3 L608F; or one or more FGFR mutants including at least the fusion FGFR2-TACC2 are present in the sample.
 2. A method of treating cholangiocarcinoma in a patient harboring the mutation FGFR3 R397C; or harboring the mutation FGFR3 L608F; or harboring the fusion FGFR2-TACC2 comprising administering a FGFR inhibitor to said patient.
 3. (canceled)
 4. (canceled)
 5. The method according to claim 1, wherein the FGFR inhibitor is erdafitinib.
 6. The method according to claim 5, wherein erdafitinib is administered at a dose of 8 mg once daily.
 7. The method according to claim 6, wherein the dose of erdafitinib is uptitrated from 8 mg once daily to 9 mg once daily after initiating treatment if the patient exhibits a serum phosphate (PO₄) level that is less than about 5.5 mg/dL.
 8. The method according to claim 1, wherein the biological sample is blood, lymph fluid, bone marrow, solid tumor, or any combination thereof.
 9. The method according to claim 1, wherein the biological sample is formalin-fixed paraffin-embedded tissue.
 10. The method according to claim 1, wherein the one or more FGFR mutants are identified by reverse-transcriptase polymerase chain reaction.
 11. The method according to claim 1, wherein the one or more FGFR mutants are identified by fluorescence in situ hybridization.
 12. The method according to claim 2, wherein the FGFR inhibitor is erdafitinib.
 13. The method according to claim 12, wherein erdafitinib is administered at a dose of 8 mg once daily.
 14. The method according to claim 13, wherein the dose of erdafitinib is uptitrated from 8 mg once daily to 9 mg once daily after initiating treatment if the patient exhibits a serum phosphate (PO₄) level that is less than about 5.5 mg/dL.
 15. The method according to claim 2, further comprising evaluating a biological sample from the patient for the presence of the mutation FGFR3 R397C, the mutation FGFR3 L608F, or the fusion FGFR2-TACC2.
 16. The method according to claim 15, wherein the biological sample is blood, lymph fluid, bone marrow, solid tumor, or any combination thereof.
 17. The method according to claim 15, wherein the biological sample is formalin-fixed paraffin-embedded tissue.
 18. The method according to claim 2, wherein the mutation FGFR3 R397C, the mutation FGFR3 L608F, or the fusion FGFR2-TACC2 is identified by reverse-transcriptase polymerase chain reaction.
 19. The method according to claim 2, wherein the mutation FGFR3 R397C, the mutation FGFR3 L608F, or the fusion FGFR2-TACC2 is identified by fluorescence in situ hybridization. 